Censorship of religious and philosophical speculation is as old as history and as current as today's headlines. Many of the world's major religious texts, including the Bible, the Talmud, the Koran, and others, have been suppressed, condemned, or proscribed at some time. Works of secular literature that touch upon religious beliefs or reflect dissenting views have also been suppressed.

Literature Suppressed on Religious Grounds, Fourth Edition profiles the censorship of many of these works. These include the frequently challenged Harry Potter series, which critics accuse of promoting witchcraft and anti-family themes, as well as Philip Pullman's His Dark Materials trilogy and Dan Brown's The Da Vinci Code.

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